If you promote a player to Co-GM status, are they able to use the join as player and join as GM functions in the settings tab? I am toying with the idea of promoting all players in my campaign to GM status, so they will be able to run their own sessions in the campaign when I am offline. However, this would destroy the utility of the whisper function and cause game members to see things placed in the GM layer, unless all players (except the one that decides to GM for that session) are able to rejoin as players.